Calculating par on ai hydra 26

[Tangina20]

Does anyone know how to calculate or even guess par readings based on ai hydra 26 settings? I have 2 hydras on a 40b 16” deep reef and plan on using the ab+ spectrum. I don’t have any access to a par meter but I feel like there should be some sort of calculation out there for something like height + light settings = ___ par.

Here is a picture of the ab+ preset but I plan to only run it 60-80% for a few lower light sps and mostly softies and lps any input on this would be helpful!

 

[Flippers4pups]

Bump.

 

[Sshannon]

bump

 

[Tangina20]

Bump

 

[reef lover]

Unfortunately there is no set equations for par values..but brs is renting par meters now i heard...